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Home › Recording element having a pyrylium or thiopyrylium-squarylium dye layer and new pyrylium or thiopyrylium-squarylium compounds

Recording element having a pyrylium or thiopyrylium-squarylium dye layer and new pyrylium or thiopyrylium-squarylium compounds

US Patent 4508811 · Granted Apr 2, 1985

Estimated economic value: $432,000 ⓘ

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